A right hexagonal prism has height 2 . The bases are regular hexagons with side length 1 . Any 3 of the 12 vertices determine a triangle. Find the number of these triangles that are isosceles (including equilateral triangles).
A right hexagonal prism has height 2 . The bases are regular hexagons with side length 1 . Any 3 of the 12 vertices determine a triangle. Find the number of these triangles that are isosceles (including equilateral triangles).